For instance many of the towers in the wall of the Tower of London used to house prisoners. read more
The 14th century donjon , the tallest medieval fortified structure of Europe, of the Chateau de Vincennes, just outside Paris, was used for royal living quarters, offices, prison, treasury, and various other uses over the centuries. read more
Various castle locations could be used for the construction of a medieval castle tower. It was one of those castle parts which could be constructed in various shapes and at various locations. For instance, there were wall towers construed on the walls and square gate towers constructed beside the main entrance. read more
Yes, a large variety of bolt and stone throwing machines were used in the defense of castles and cities. When gunpowder arrived on the scene it was first used to fire bolts and many city governments bought these new machines on their own initiative. That said they did not completely displace older torsion operated engines like the springald. read more